LiAHA--CHCH=CHCH-CHO-_-+CH, CH=CHCH, Br 3.以甲醇和2-氯丁烷为原料合成CH3CH2CH( CH3)CHO KCr2O7 CHOH 答 H3O,△ HCHO CH3CHCH2CH, E0 3CHCH CA3 2.H30 MgCl KCrO CH3 CHCH2 CH3 CH? CH2CHCHO CH,OH CH 4.以丙酮为原料合成(CH3)2C= CHCOOH OH 2 CH3COCH 5%NaOh △ 答 (CH3h2CCH2CCH3-H20 Naoh (CH3)2C=CHCCH3 2.H2O (CH3)2C=CHCOOH CHI3 OH 5.以B(CH2)CHO为原料合成(CH3) C(CH2)4OH Br(ch,)cHo-EtOH oC Br(Ch2)3Ch 答 BrMg(ch,3Ch OC2H5 1.CH2COCH COCH 2. HOt (CH3)2C(CH2)3CHO OH aBHa (CH3hC(CH2)4OH 6.以乙烯和丙酮为原料合成CH=CHCH2OC(CH3)2CH1CH2CH CHCHECH BrCHCH= CH46 CH CHCH2Br 3CH CHCH2CHO LiAlH4 PBr3 0 oC CH3CH 3．以甲醇和 2-氯丁烷为原料合成 CH3CH2CH(CH3)CHO 答： CH3OH HCHO K2Cr2O7 H3O + , Mg Et2O CH3CHCH2CH3 2. H3O + Cl CH3CHCH2CH3 MgCl 1. HCHO CH3 K2Cr2O7 H3O + , CH3CHCH2CH3 CH2OH CH3CH2CHCHO 4．以丙酮为原料合成 (CH3 )2C CHCOOH 答： 2 CH3COCH3 5%NaOH (CH3 )2CCH2CCH3 OH O -H2O 2. H3O + (CH3 )2C CHCOOH O CHCCH3 1. I2 /NaOH (CH3 )2C + CHI3 5．以 Br(CH2)3CHO 为原料合成 OH (CH3 )2C(CH2 )4OH 答： Mg Et2O Br(CH2 )3CHO EtOH H + Br(CH2 )3CH OC2H5 OC2H5 2. H3O + BrMg(CH2 )3CH OC2H5 OC2H5 1. CH3COCH3 (CH3 )2C(CH2 )3CHO OH OH (CH3 )2C(CH2 )4OH NaBH4 6．以乙烯和丙酮为原料合成 CH2 CHCH2OC(CH3 )2CH2CH2CH3 答： CH3CH CH2 BrCH2CH CH2 NBS CCl4